NumberResearchRecent thousands-block assignments
18 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 661
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-05-14 | 661-673-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNCA SGCC | CA |
| 2009-05-13 | 661-232-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MOJAVE | CA |
| 2009-05-04 | 661-341-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2009-04-28 | 661-379-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD MAIN | CA |
| 2009-04-22 | 661-621-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | SNCA SGCC | CA |
| 2009-03-25 | 661-829-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BKFD NORTH | CA |
| 2009-02-27 | 661-368-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BKFD NORTH | CA |
| 2009-02-20 | 661-375-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DELANO | CA |
| 2009-02-10 | 661-748-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-10 | 661-748-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-10 | 661-748-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-10 | 661-748-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-10 | 661-748-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-10 | 661-748-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-02-09 | 661-200-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2009-02-09 | 661-349-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2009-02-09 | 661-349-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLDL PLDL | CA |
| 2009-02-05 | 661-375-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DELANO | CA |
| 2009-01-29 | 661-456-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | PLDL PLDL | CA |
| 2009-01-28 | 661-270-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL LNVY | CA |
| 2009-01-28 | 661-450-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL AGDL | CA |
| 2009-01-28 | 661-480-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLDL PLDL | CA |
| 2009-01-28 | 661-532-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIG BUTTE | CA |
| 2009-01-28 | 661-724-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LAKEHUGHES | CA |
| 2009-01-28 | 661-727-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HI VISTA | CA |
| 2009-01-23 | 661-412-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | BKFD SOUTH | CA |
| 2009-01-23 | 661-579-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LANCASTER | CA |
| 2009-01-23 | 661-579-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | LANCASTER | CA |
| 2009-01-15 | 661-371-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-01-15 | 661-371-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BKFD MAIN | CA |
| 2009-01-12 | 661-902-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LANCASTER | CA |
| 2008-12-17 | 661-368-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD NORTH | CA |
| 2008-12-17 | 661-375-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DELANO | CA |
| 2008-12-17 | 661-412-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD SOUTH | CA |
| 2008-12-17 | 661-412-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD SOUTH | CA |
| 2008-12-17 | 661-505-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA NHCS | CA |
| 2008-12-17 | 661-513-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | CA |
| 2008-12-17 | 661-513-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNCA SGCC | CA |
| 2008-12-17 | 661-524-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LANCASTER | CA |
| 2008-12-17 | 661-524-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LANCASTER | CA |
| 2008-12-17 | 661-731-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EARLIMART | CA |
| 2008-12-17 | 661-748-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BKFD MAIN | CA |
| 2008-12-17 | 661-750-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEHACHAPI | CA |
| 2008-12-17 | 661-752-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ROSAMOND | CA |
| 2008-12-17 | 661-769-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TAFT | CA |
| 2008-12-17 | 661-772-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WASCO | CA |
| 2008-12-17 | 661-776-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SHAFTER | CA |
| 2008-12-17 | 661-927-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MCFARLAND | CA |
| 2008-11-25 | 661-200-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNCA NHCS | CA |
| 2008-11-19 | 661-412-4XXX | 4000–4999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | BKFD SOUTH | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.